16 Channel Brain Tissue Stimulator

SKU: 010179



The pathways of brain circuitry can be studied by delivering current impulses to brain tissue and observing the tissue response. The goal of this project is to develop a current source to be used for in vitro stimulation of rodent neural tissue. The current source must deliver independently controlled currents to 16 separate electrodes on a 16 microelectrode array. In addition, the currents must be controllable via TTL computer logic and have a short response time to the initial signal. The design described in this report uses a transformer to supply a large isolated voltage to 16 circuits which will convert the voltage to an appropriate current. The current on each channel will be controlled by a potentiometer which varies the magnitude of the impulse received from a TTL computer signal. When the computer program supplies an impulse, a corresponding square wave current pulse will be applied to the tissue.

peerless student project center